US Patent Issued to Nikon on May 13 for "Optical system, optical equipment, and manufacturing method for optical system" (Japanese Inventors)

ALEXANDRIA, Va., June 12 -- United States Patent no. 12,298,593, issued on May 13, was assigned to Nikon Corp. (Tokyo).

"Optical system, optical equipment, and manufacturing method for optical system" was invented by Mami Muratani (Tokyo) and Fumiaki Ohtake (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical system comprises, in order from an object side, a front group GF having positive refractive power, an aperture stop S and a rear group GR. The front groupFR comprises a front focusing group GFF having positive refractive power, and the rear group GR comprises a rear focusing group GRF having positive refractive power, upon focusing the front focusing group GFF and the rear focusing group GRF...